用tkinter实现的gui小工具

import tkinter
import requests
import json
from tkinter import *

class FindLocation(object):
    def __init__(self):

        # 创建主窗口,用于容纳其它组件
        self.root = tkinter.Tk()
        # 给主窗口设置标题内容
        self.root.title("天气预报查询")

        # 创建一个输入框,并设置尺寸
        self.city_input = tkinter.Entry(self.root,width=50)
        self.city_input.grid(row=0,column=0)

        # 创建一个查询结果的按钮
        self.result_button = tkinter.Button(self.root, command = self.find_position, text = "查询",bg='black',fg='white')
        self.result_button.grid(row=0,column=1)
        #清除按钮
        self.clear = tkinter.Button(self.root,text="清除",command=self.inputclear,bg='black',fg='white')
        self.clear.grid(row=0,column=2)
        # 创建一个回显列表
        self.display_info = tkinter.Listbox(self.root, width=50)
        self.display_info.grid(row=1)
        self.root.mainloop()

    def inputclear(self):

        self.city_input.delete(0,END)

    def gui_arrang(self):
"此方法暂时不用，和界面布局冲突"
        self.cityLabel.pack()
        self.city_input.pack()
        self.result_button.pack()
        self.display_info.pack()
        self.clear.pack()

    def find_position(self):
        self.city = self.city_input.get()
        url = 'http://www.sojson.com/open/api/weather/json.shtml?city='+self.city
        headers={"User-Agent":"Mozilla/5.0 (Windows NT 6.1; WOW64; rv:54.0) Gecko/20100101 Firefox/54.0","Accept-Language":"zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3"}

        r = requests.get(url,headers = headers)
        json = r.json()
        try:

            date=json["date"]                                                            #今日日期
            ganmao=json["data"]["ganmao"]                                     #防感冒建议
            high=json["data"]["forecast"][0]["high"]                #最高温度
            low=json["data"]["forecast"][0]["low"]                  #最低温度
            types=json["data"]["forecast"][0]["type"]                 #天气类型
            notice=json["data"]["forecast"][0]["notice"]             #注意事项

            the_weather_info = ["日期:"+str(date),"生活建议:"+str(ganmao),str(high),str(low), "天气类型:"+str(types), "注意事项:"+str(notice)]
        except:
            the_weather_info = ["如果您输入的城市无误，请稍后刷新！"]

        #清空回显列表可见部分,类似clear命令
        for item in range(10):
            self.display_info.insert(0,"")

        # 为回显列表赋值
        for item in the_weather_info:
            self.display_info.insert(0,item)
        # 这里的返回值,没啥用,就是为了好看
        #return the_weather_info

def main():
    # 初始化对象
    FL = FindLocation()
    #FL.gui_arrang()
    # 主程序执行
    #FL.mainloop()
    pass

if __name__ == "__main__":
    main()